From owner-svn-src-all@FreeBSD.ORG Tue Nov 18 18:52:39 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 4F94A656; Tue, 18 Nov 2014 18:52:39 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3B4D92A9; Tue, 18 Nov 2014 18:52:39 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id sAIIqdHv002983; Tue, 18 Nov 2014 18:52:39 GMT (envelope-from delphij@FreeBSD.org) Received: (from delphij@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id sAIIqd7S002982; Tue, 18 Nov 2014 18:52:39 GMT (envelope-from delphij@FreeBSD.org) Message-Id: <201411181852.sAIIqd7S002982@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: delphij set sender to delphij@FreeBSD.org using -f From: Xin LI Date: Tue, 18 Nov 2014 18:52:39 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r274674 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Nov 2014 18:52:39 -0000 Author: delphij Date: Tue Nov 18 18:52:38 2014 New Revision: 274674 URL: https://svnweb.freebsd.org/changeset/base/274674 Log: Add a tunable for spa_slop_shift which controls how much space we would reserve by default. Tuning is not recommended. MFC after: 2 weeks Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Tue Nov 18 18:40:01 2014 (r274673) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Tue Nov 18 18:52:38 2014 (r274674) @@ -401,6 +401,9 @@ zfs_deadman_init() * See also the comments in zfs_space_check_t. */ int spa_slop_shift = 5; +SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_slop_shift, CTLFLAG_RWTUN, + &spa_slop_shift, 0, + "Shift value of reserved space (1/(2^spa_slop_shift))."); /* * ==========================================================================